1. Science Test Vocabulary
Astronomy-Vocab List

2. air pressure
The force of the weight of air pushing on a surface

3. axis
an imaginary straight line running through Earth from pole to pole

4. core
the innermost layer of Earth, located beneath the mantle

5. crust
the thin, rocky outer layer of Earth, above the mantle

6. the blocking of the light from one astronomical object by another
eclipse
the blocking of the light from one astronomical object by another

7. gravitational force
the force of attraction between all masses in the universe

8. a region where a magnetic force can be detected
magnetic field
a region where a magnetic force can be detected

9. the layer of rock between Earth’s crust and core
mantle
the layer of rock between Earth’s crust and core

10. the portion of a moon or planet that is illuminated
phase
the portion of a moon or planet that is illuminated

11. revolution
the motion of one body around another, like Earth’s orbit around the Sun

12. the spinning of a body, like Earth, on its axis
rotation
the spinning of a body, like Earth, on its axis

13. tides
the alternating rise and fall of the surface of the ocean or other large bodies of water